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TRAVEL DEMAND MODELS, DUALITY RELATIONS AND USER BENEFIT CALCULATIONS

A large number of transportation studies have, for the purpose of calculating user benefits associated with a test strategy, adopted the assumption that marginal changes occur in the cost of transport movements. In a consideration of the consistency requirements between forecasting models and evaluation forms, the marginality assumptions were relaxed in the development of model dependent user benefit measures. In addition, the properties of non-linear programs, which are used to form travel demand models, are invoked to relate consumer surplus changes directly to a set of dual variables. The methods are shown to produce a number of exact results for a wide range of spatial interaction, mode split and route split models. /TRRL/

Corporate Authors:

University of Leeds

Institute for Transport StudiesLeeds, West Yorkshire
United Kingdom
LS2 9JT